<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>Document</title>
		<style>
			/* 为了便于查看，特意设置的与布局本身无关的样式 */
			div {
				padding: 20px;
				border: 1px solid #ccc;
			}
			/* 使用弹性容器进行布局 */
			.row {
				display: flex;
				height: 300px;
			}

			.col {
				width: 200px;
			}
		</style>
	</head>
	<body>
		<div class="row">
			<div class="col">第一列</div>
			<div class="col">第二列</div>
			<div class="col">第三列</div>
		</div>
	</body>
</html>
